Pipe-tongs.



H. e. KURT'ZHAL-S.

PIPE TONGS.

. 1916. 1,288,817. Patented 001:. 29, 1918.

HENRY 6. KURTZHALS, OF SHIPPENSVILLE, PENNSYLVANIA.

- PIPE-TONGS.

' Specification of Letters Patent.

Patented Oct. 29, 1918.

Application filed March 15. 1916. Serial No. 84.439.

To (121 irhom it may concern Be it known that I, HENRY G. KUn'rzinns, a citizen of the UnitedStates. residing atxShippensville. in the county of Clarion and State of Pennsylvania, have invented certain new and useful Improvements in Pipe-Tongs, of which the following is a specification.

An object of my invention is to provide a pair of tongs of the crossed handle type constructed and arranged in such a manner that the gripping jaw of one of the handles ismade hook-shaped to overhang the remaining jaw and is mortised or cored 'out to re ceive any one of a plurality of liners or bushings having various sized openings formed therein to accommodate the same to the different sizes of pipe with which the tongs may be used. the remaining handle being provided with a die or grip interchangeably mounted on the jaw thereof in such relation that as gripping force is exerted on the handle, this die or grip will engage with the pipe and will cause the same. to be more tightly held in the opening ofthe liner or bushing, while at the same time presenting a roughened" surface to prevent turning of the pipe.

With the above and other objects in view. my invention consists in certain novel features of construction and combinations of parts which will be hereinafter set forth in connection with the accompanying drawings and then more particularly pointed out in the claim.

In the drawings:

Figure 1. .is a viewein side elevation of a pair of tongs constructed after my invention.

Fig. 2 is a view in top elevation of the tongs disclosed in Fig. 1.

Fig. 3 is a longitudinal sectional through the, main gripping jaw. I

Fig. 4 is a view in elevation of one of the liners or bushings.

Fig. liners. 1

Fig. 6 is a fragmentary detail view of the main gripping jaw looking into the same and with the liner removed.

Fig. 7 is a view similar to Fig. 3, showing the secondary gripping jaw.

Fig. 8 is a fragmentary detail view looking toward the gripping jaw shown in Fig. 7 with the grip removed.

View

thereof 5 is a perspectiveview of one of the Fig. 9 is a view in the dies or grips.

Fig. 10 is a view in side elevation of one of the liners to be fitted to the main jaw.

The handles 1 and 2 are pivoted together by means of the pin or rivet 3 and these. handles are made of sufficient lengththat the proper fulcrum or leverage niav be obtained. i

The handle 1 is offset to one side as at 4 and is then shaped in a curved formation to provide the hook-shaped,gripping jaw 5, wlnch jaw is so shaped that the hill 6 is substantially in linewith the main extent of the handle 1. The handle 2 is extended past the bearing for the pin 3 to form the jaw T whlch'issubstantially in line with the main extent of the handle and this jaw is cut acrloss or beveled as at 8 on its extreme outer eat.

It is the intention that the pipe shall be fitted in such a relation that the jaw 5 is disposed with the bill 6 thereof hooked around the same and that the handles 1 and 2 shall then be manipulated to bring the jaw 7 against the pipe, and it is therefore desirable that the inner face 9 of the jaw 5 be shaped to the arc of a circle of a slightly greater diameter than the largest size of pipe on which the tongs are intended to be used. The jaw 7,'on the beveled face 8 is notched out to provide a recess 10, and a mortise opening 11 is formed into the perspective of one of metal of the jaw beyond this notched out opening at 10. A die or grip 12 is shaped to be received in the notched opening 10 and is provided...with astonguedi of tar-ion shape, to be received in the mortise 11, the outer face of the grip 12 being provided with the biting teeth 14. The jaw 7 and the tongue or tenon 13 have openings provided in alincment therethrough and a pin or rivet 15 is fitted through these alined openings to hold the grip 11 secured within the notched out opening 10, and it will thus be seen that by removing this pin or rivet 15 the grip 12 may be removed from its operative position and may be reversed to reverse the biting teeth 14 or may be replaced with a new grip having the same form of biting teeth-or having a greater or lesser number of teeth of the same or a varied configuration.

The gripping face 9 of the jaw 5 is mortised out as at 16. and at the extreme end of the bill 6, a notched opening 17 is provided I in this face. The liners or bushings 18 are adapted to pro ided with the tongues or tenons 19 be received in the mortise 16 of and these liners or bushings are the jaw 5,

the extensions 20 to be reprovided with ceived over the extreme end of the bill 6 the liner and the under face of the extension or projecting end 20 for reinforcing this projecting end 20.

I be taken by the tongs to the which the tong is adapted to operate upon, have the body portions thereof cut or shaped i be embraced throng IOIltiSllbSttLlltittllY half,

the. gripping face 9, and thus The sides of the jaw 5 and the tongues 19 are provided with alined openings and the pin or ,rivet 22 isfitted through thes'e-alined openi ngs to Secure the liners or bushings in the proper relation.

The liners of which there maybe any number, it being preferable that these liners be furnished with each pair of'tongs 1n a set' comprising a separate liner for each individ;

ual size of pipe from the largest which will out to provide the gripping opening 23,

which is fo-rmedlon the arc of a circle of slightly greater diameter than the pipe to be operated upon, similar to the formation of i when the proper liner is fitted in place to operate upon the size of pipe bein wo'rked,the pipe will ormore of its circumference in this reasonably closely fitting liner of bushing, and as the handles 1 and 2 are pressed together, the grip 12 will be brought to protruding side of the opening of the liner against rolling movement to shift from the engagement from the teeth 14: of the grip 12, and the turning movement exerted upon the handles of the tongs, in an inwardly swinging path in ac cordance with the disclosure n Fig. 1, will cause these teeth to bite more deeply into the pipe and in eonsequenceas thepressure smallest size I bear against the. pipe, and consequently, a very efficient grlpping action will be accomplished as the pipe is held in the exerted in the turning action is increased,

the biting vforce of the teeth 14 will be correspondingly greater. While the jaw 7 will come-to a hard gripping bearing against the pipe, there is not any tendency of the parts to jam or to become wed'gedupon the pipe, by reason of the fact that the j aw 7 is bev' eled across as at 8, and'the toothed face of the grip 12 follows this same lineof'bevel;

While I have herein shown and described the grip and the liners as being of specific form, held in the jaws by having the" tongues thereof fitted in the mortise's, and then pinned through, it will of course be apparent' to those skilled in the art that changes.

might be resorted to in the fastening means,

that the form and configuration of the grip and liners may be varied, and that a number of modifications and changes might be resorted to without departing from the spirit and scopeof my invention,-and hence I wish to be limitedonly to suchpoints as may be set forth in the claim.

I claim: 1 a

As a new article of manufacture a pipe wrench comprising a pair of handlespivotally connected together, a jaw formed on each handle, one of said jaws provided with an arcuate grippingfaoe, a liner fitting upon the gripping face of said last mentioned jaw, said, last mentioned jaw provided with a mortise formed therein near the center thereof, said last mentioned jaw alsoprovideol- 85 with a second mortise near the outer end thereof, a tenon fprmed upon said liner and fittingin said first mentioned-mortise, a projectingend extending at an angle from said liner and overhanging the end of said last mentioned jaw, a rib projecting at an angle across said liner between the outer side of said liner and the under-face of said projectingend for reinforcing the same, and adapted to fit in said second mortise for firmly holding the outer end of said liner against shifting movement.

In testimony whereof I afiix my signature in presence of two witnesses."

HENRY o. KURTZHALS.

Witnesses 'RHIEARL Bnsner, JOSEPH SMITH. 

